Medium thick plate continuously casting and head-less rolling process

An endless rolling and continuous casting technology, which is applied in the field of metallurgical steel rolling, can solve the problems of low production efficiency, long process flow, low yield, etc., achieve less water consumption, help control rolling, and improve metal yield rate effect

Inactive Publication Date: 2006-03-01
SHENYANG STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a continuous casting endless rolling medium and heavy plate process to solve the problems of long process flow, high energy consumption, low yield and low production efficiency in the existing medium and heavy plate production technology

Method used

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  • Medium thick plate continuously casting and head-less rolling process
  • Medium thick plate continuously casting and head-less rolling process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] See figure 1 , the continuous casting endless rolling medium and heavy plate process of the present invention, its technological process is: slab continuous casting→liquid core pressing→high temperature rolling→flying shear head→steam water cooling→finish rolling→segmented flying shear→ Laminar cooling → cooling bed or underground coiling → finishing → storage.

[0023] The specific process is: pour the molten steel through the tundish 1 into the crystallizer 2 for pouring, and then enter the cooling section 3 of zone A, and use nitrogen protection to control cooling, and the surface temperature of the billet will drop to 1200 ° C. According to the following technology, the continuous casting slab is thinned by 15mm, and then the slab directly enters the rough rolling unit 4 in the B area for rolling, and the steam-water cooling 6 is used in the B area to control the surface temperature of the slab. Cut off the cut head brought by the dummy ingot, and then enter the fi...

Embodiment 2

[0025] Embodiment 2 is basically the same as Embodiment 1, the difference is that the start rolling temperature of rough rolling is 1050°C and the finish rolling temperature is 900°C controlled by steam-water cooling device; The temperature of the thick plate was reduced to 600°C.

Embodiment 3

[0027] Embodiment 3 is basically the same as Embodiment 1, the difference is that the start rolling temperature of rough rolling is 1100°C and the finish rolling temperature is 930°C controlled by steam-water cooling device; The temperature of the slab dropped to 620°C.

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Abstract

The continuously casting and head-less rolling process for moderately thick plate includes the following steps: continuously casting plate blank, depressing liquid core, high temperature rolling, end cutting with flying shear, steam water cooling, finish rolling, sectional shearing, laminated cooling, cold bed or ground winding, finishing and warehousing. The present invention has raised metal yield, lowered fuel and power consumption, low end cutting rate, less rolling gates, and high output and finished product rate.

Description

(1) Technical field [0001] The invention belongs to the field of metallurgical steel rolling, in particular to a continuous casting endless rolling process for medium and thick plates. (2) Background technology [0002] In recent years, with the intensification of the world's energy crisis, the metallurgical industry, as a large energy-consuming household, has had serious contradictions between capacity expansion and energy scarcity. Energy-saving and high-efficiency production processes have become the main research direction of metallurgical enterprises. Currently, medium and heavy plate production adopts In two steps, the continuous casting slab is first cast in the steelmaking workshop, and after inspection and finishing, it is sent to the steel rolling workshop, where it is heated in a heating furnace for cold charging or hot charging, and then reciprocating rolling is carried out by 1 to 2 rack rolling mills. finished product. The process flow is long, the investment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/46
Inventor 周久乐
Owner SHENYANG STEEL
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